Abstract
A novel electrochemical sensor is reported for the detection of isoprene levels in breath using a ZIF-based electrochemical nose. This sensor incorporates a hybrid detection system using gold nanoparticles encapsulated inside the ZIF-8 moiety. Breath-based analysis is widely being used for monitoring the metabolic state of the body. It is associated with the change in the concentration of volatile organic compounds and inorganic gases released endogenously and can be tracked using breath as the sample. One such volatile organic compound, isoprene, has been correlated to the presence of influenza virus or respiratory inflammation. Analytical techniques such as powder X-ray diffraction, scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, and tunneling electron microscopy were used to understand the structural features of the composite. The electrochemical nose system uses chronoamperometry as the transduction mechanism to monitor the diffusion kinetics of the target analyte across the electrode–electrolyte interface. The presented work demonstrates isoprene sensing with high sensitivity and specificity and a detection limit of 10 parts per billion in air. We successfully demonstrate the functionality of the ZIF-based electrochemical nose for point-of-care screening of isoprene levels by developing a prototype device using a commercially available development board. We foresee that the developed sensing platform can help in early screening for the presence of influenza virus and help control the infection rate.
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Acknowledgements
I.B. and A.P. acknowledge Vikram Narayanan Dhamu and Paul Rice for their help and support.
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S. P., S. M., I. B., and A. P. conceived the theoretical framework of the detection scheme and design of experiments. I. B. performed the sensor functionalization used in the experiments. I. B. performed the experiments. I. B. and A. P. analyzed the experimental data and drafted the paper. A. S. helped in developing the prototype and the data collection.
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Shalini Prasad and Sriram Muthukumar have a significant interest in Enlisense LLC, a company that may have a commercial interest in the results of this research and technology. The potential individual conflict of interest has been reviewed and managed by The University of Texas at Dallas and played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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Banga, I., Paul, A., Sardesai, A. et al. AuNP@ZeNose (ZIF-based electrochemical nose) for detection of flu biomarker in breath. Microchim Acta 189, 231 (2022). https://doi.org/10.1007/s00604-022-05334-1
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DOI: https://doi.org/10.1007/s00604-022-05334-1